Apparatus for grinding and refining material



J. J. GRIEB ETAL 2,748,667

APPARATUS FOR GRINDING AND REFINING MATERIAL 3 Sheets-Sheet 1 June 5, 1956 Filed July 16, 1955 197' 7' ORA/6' y June 1955 J. J. GRlEB ETA], 2,748,657

APPARATUS FOR GRINDING AND REFINING MATERIAL Filed July 16, 1953 3 Sheets-Sheet 2 Arr-0 way APPARATUS FOR GRINDING AND REFINING MATERIAL Filed July 16, 1953 June 1956 J. J. GRlEB ETAL 3 Sheets-Sheet 3 nited States Patent APPARATUS FOR GRINDING AND REFINING MATERIAL John J. vGrieb and Napoleon Rigabar, Carthage, and Roswell F. Taylor, Water-town, N. Y., assignors, by mesne assignments, to Roswell F. Taylor, Watertown, N. Y.

Application July 16, 1953, Serial No. 368,388.

3 Claims. (CI. 92-26) Thisinvention relates to machines for grinding, reducing and refining material, such as fibrous material or pulp, but it should be understood that the machine is,

applicable to reducing and refining other material.

The machine belongs to the type in which the material being reduced or refined. is fed into a nip between a grinding roller or stone and a coating surface and is reduced thereby to the desired extent.

The invention has for its salient object to provide in a machine of the character described means for regulating and controlling the rate of feed; and the quantity of material fedinto the nip.

Another object of the invention is to provide adjustable means for regulating and controlling the extent of engagement of the grinding roller or stone with the, material being operated upon.

Another object of the invention is to provide in a machine of' the character described controlling and regulating means so constructed and arranged as to effectefiicien-t feeding and grinding or refining and prevent jamming or stopping of the machine due to an excess of material in the nip.

Another object of the invention is to provide in a machine of the character specified controlling and regulating means for preventing excess pressure. being exerted on the material as it is being refined.

Further objects of the invention will appear from the following specification taken in connection with the. drawings which form a part of this application, and in which Fig. l is a side elevation of a machine constructed in accordance with the invention;

Fig. 2 is an elevational view, partly in. section, taken at right. angles to Fig. l; and

Fig. 3 is a vertical sectional elevation taken substantially on line 33 of Fig. 2, looking in the direction of the arrows.

Theinvention has been worked out in connection with a refining or reducing machine having a grinding roller or'stone disposed in coacting relation with reference to a rotary cylindrical feeding member which, in the form of the invention shown, consists of av ring. The material to be operated upon is fed into the machine in any suitable manner between the rotary feeding member, such as the ring, and the rotating abrasive or grinding roller, the two members being preferably rotated in the same direction and at different speeds. The feeding member is rotated at a slower speed than the. grinding member or stone.

The invention briefly described consists of introducing into the space between the operative portions of the ring and stone, means, preferably adjustable, for determining the area of the stone engageable by the material and also operative to feed the material at the desired speed into the nip between the stone and. the ring or feeding member. Further details of the invention will appear from the following description.

In the particular embodiment of the invention illustrated in the drawings, the grinding roller or stone is mounted on a shaft 11 supported insuitable bearings 12 and 13 and driven from any suitable source of power at the desired speed.

The stone or roller lllis disposed within a ring 15, the inner surface of which is preferably abrasive.

As illustrated in the drawings, the ring 15 is formed in two sections, 15A and 158, which are bolted together by bolts 16 which extend through flanges i7 and formedon the ring sections. A gear ring 29 is secured to the ring 15 between the flanges 17 and 18 by the bolts 16'. The ring 15 also has formed on its outer surface, outwardly extending portions or flanges 21 and 22.

The ring 15 is rotatably supported in a pair of rings 23 and 24, to the sides of which are bolted fiat rings 30, 3d and 31, 31. Arcuate bearing blocks 32 and 33 are interposed at the bottom portion of the machine between the rings 23 and 24 and the outer surfaces of the projecting portions 21 and 22 of the ring 15. Similar bearing blocks, not shown, are provided at the top of the machine to hold down the ring 15. The outer flat rings "30 and 31 have secured to the outer surfaces thereof, annular housing members 35' and 36, and the inner flat rings 30 and 31 have secured thereto flanges 37 and 38 of a central annular housing member 39.

The parts above described as secured to the rings 30 and 31 andv to the rings 23 and 24 are bolted thereto by bolts 40 and 41, it being understood that these bolts,

as shown in Fig. 3, extend entirely around the ring 15 projecting brackets 45 which receive a pivot shaft 46 mounted in brackets 47 supported on the base 48 of the machine. The ring 15 and all of the parts carried thereby, as above explained, can be swung on the pivot shaft 46 to regulate the spacing of the coacting surfaces of the grinding roller 1t and the ring 15. This is accomplished inthe following manner. On the opposite side of the machine from the brackets 45 and pivot shaft 46, the flat rings 30, 30 and 31, 31 have formed thereon and extending outwardly therefrom brackets 50, each of these brackets having a bore 51 which receives a vertical screw 52, the screw being rotatable freely within the bore and not being threaded thereto. The bottom of each screw 52 has mounted thereon a spherical thrust bearing member 53, which is mounted in a spherical seat 54, which in turn is supported on a machine base member 55. A nut 56 is threaded on each screw 52 and has a worm gear 57 on the outer surface thereof. This gear meshes with a worm 58 mounted on a shaft 59 carried by a block 60 which houses the nut 56. The shaft 59, as shown in Fig; 1, has secured to one end thereof a hand wheel 61. The block 69 has extending upwardly therefrom a projection 62 which surrounds the screw 52 and is engageable with the under surface of the bracket 50.

As the hand wheel 61 is rotated or turned, the worm 58 on the shaft 59 will rotate the worm gear 57 and nut 56', thus causingthe nut to travel upwardly or downwardlyon thescrew 52, depending on the direction of rotation of the hand wheel. As above explained, there. are two brackets 51, one being secured to the rings 39, 30 and the other being secured to the rings 31, 31. The shaft 59 operates the worms 58 which effect simultaneously the vertical adjustment of the nut 56 and housing 60 mounted on the two screws 52 and thus vertically adjust the ring 15 relative to the stone 10.

The ring gear 29 carried by the ring 15 is rotated by a pinion 65 mounted on a shaft 66 which is supported in bearings carried by the upper end portions of the bracketsthis wheel is driven from any suitable source of power and is preferably connected to a variable speed drive so that the rate of rotation of the ring 15 can be regulated and controlled.

Side plates 70 and 71 are secured to flanges formed on the outer ends of the housing members 35 and 36.

Material feeding and control means The material, such as pulp fiber, which is to be treated in the machine, is fed into the ring 15 at the point A shown in Fig. 1 above the upwardly extending portions of the side plates 70 and 71. In order to control the area of the outer surface of the grinding roller or stone engaged by the material being operated upon, there is mounted in the ring 15, between the upwardly extending portions of the side plates 70 and 71, a plate 80 having an arcuate lower end portion 81, which is provided on its surface facing the inner surface of the ring with a plurality of transverse tooth-like projecting portions 82. The portions 82 extend preferably the full width of the plate 80.

The plate 80 has side flanges 83 and these flanges at their upper ends are adjustably connected by a pin and slot connection 85, S6 to the lower ends of arms 87. The arms 37 have laterally projecting pins 88 at their upper ends, these pins being mounted in substantially horizontal slots 89 carried by brackets 90. The brackets 90, one at each side of the machine, are secured to the outer flanges on the housing members and 36.

The arms 87 are operated by links 95 which are pivoted at 96 to the arms and are pivoted at 97 to disks 98 mounted on a shaft 99. The shaft 99 has secured thereto a pulley 100. which is driven by a belt 101, which in turn is driven by a pulley 102 mounted on a shaft 103 carried by a variable speed gear box 104. The variable speed gearing in the box 104 is driven by a belt 105, which is driven by belt and pulley connections from a shaft 106 of a motor M mounted on a bracket 107 carried by the machine frame.

The motion of the lower end of the feed and tamping plate 80 is controlled in the following manner. The flanges 83 at the lateral edges of the feed plate 80 have projecting therefrom studs or rollers 110, which are mounted in slots 111 formed in arms 112 pivoted at 113 to the upwardly projecting portions of the side plates 70 and 71. The arms 11?. are adjustably mounted by means of a threaded stud 115 at the lower end of each arm, the stud extending through a slot 116 in the arm 112 and adjustably bolting the arm to the side plates 70 or 71, as the case may be.

'By means of the adjustment S5, 86 at the upper ends of the flanges 83, and the adjustment 115, 116 at the lower ends of the arms 112, the position of the feed plate relative to the inner surface of the ring 15 and the outer surface of the grinding roller or stone 10 can be regulated. Moreover, by the variable speed connections between the motor M and the shaft 99 the speed of operation of the feed plate can be so regulated that the material will be tamped into the nip at the desired rate of speed to a position in the nip where the ring can feed it. It is thus possible to accurately determine the quantity or amount of material fed into the nip so that the material will be efficiently refined or ground and will not jam due to an excess amount of material being presentj in the nip.

It will be understood that, as illustrated in Fig. 2, the driving connections for the feed plate are duplicated at both sides of the machine.

Although the driving connections for the grinding roller or stone 10 and for the ring driving shaft 66 are not illustrated, it will be understood that variable speed driving connections can be provided for the shafts 11 and 66 so that the ring 15 and the stone or roller 10 will be operated at the desired differential speeds.

Although one specific embodiment of the invention has been particularly shown and described it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claims.

What we claim is:

1. In a machine of the character described, a rotatable cylinder having an inner grinding surface, side plates at the ends of the cylinder, a grinding roller rotatably mounted in said cylinder and forming with the inner surface of the cylinder, a nip to receive material to be refined, an adjustable reciprocablc plate mounted between the side plates and above the upper portion of the roller and having a lower arcuate end curved in the general direction of the opposed faces of the cylinder and roller and extending downwardly into the nip space between the coacting grinding surfaces for regulating the area of contact between the material being ground and the grinding roller, the adjustment for the reciprocable plate including an arm pivoted to each side plate and having two slots therein, a guide pin carried by each side of the reciprocating plate freely extending into one guide slot of the adjacent arm and an anchor stud carried by each side plate and extending through the other slot of the adjacent arm for securing the arm in adjusted position with respect to the adjacent side plate.

2. In a machine of the character described, a rotatable cylinder having an inner grinding surface, side plates at the ends of the cylinder, a grinding roller rotatably mounted in said cylinder and forming with the inner surface of the cylinder, a nip to receive material to be refined, an adjustable reciprocable plate mounted between the side plates and above the upper portion of the roller and having a lower arcuate end curved in the general direction of the opposed faces of the cylinder and roller and extending downwardly into the nip space between the coacting grinding surfaces for regulating the area of contact between the material being ground and the grinding roller, the adjustment for the reciprocable plate including an arm pivoted to each side plate, pin and slot conncetions between the reciprocating member and arms. and means for holding the arms in pivotally adjusted positions with respect to the side plates.

3. In a machine of the character described, a rotatable cylinder having an inner grinding surface, side plates at the ends of the cyinder, a grinding roller rotatably mounted in said cylinder and forming with the inner surface of the cylinder, :1 nip to receive material to be refined, an adjustable reciprocable plate mounted between the side plates and above the upper portion of the roller and having a lower arcuate end curved in the general direction of the opposed faces of the cylinder and roller and extending downwardly into the nip space between the coacting grinding surfaces for regulating the area of contact between the material being ground and the grinding roller, the adjustment for the reciprocable plate including an arm pivoted to each side plate, and means for holding the arms in pivotally adjusted positions with respect to the side plates.

References Cited in the file of this patent UNITED STATES PATENTS 248,122 Tustin Oct. 11, 1881 315,338 Raymond Apr. 7, 1885 373,817 Davis Nov. 29, 1887 410,878 Cornelius Sept. 10, 1889 1,682,511 Haug Aug. 28, 1928 1,717,126 State June 11, 1929 1,736,394 Dierkes Nov. 19, 1929 

